From patchwork Wed Feb 21 16:26:34 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Huth X-Patchwork-Id: 13565948 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id DD44CC48BEB for ; Wed, 21 Feb 2024 16:27:26 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rcpQq-0007XT-Vf; Wed, 21 Feb 2024 11:26:53 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rcpQp-0007W0-CF for qemu-devel@nongnu.org; Wed, 21 Feb 2024 11:26:51 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rcpQn-0008Em-35 for qemu-devel@nongnu.org; Wed, 21 Feb 2024 11:26:51 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1708532808; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=CXDKVpwJAYA4YVPBkA8OYk6BlM/3pdgrzFZ7ieOCgNQ=; b=ZtiEDVtqfUrb9zn9PNODDgO9+DZN59BO4KQCnkyH1tSn5M7JWIxvjABFJ62+cYx8Jr+bB8 rQFR/FwSc7gB7Pwbe8vkjDmLShc+oKPSfjjTD2u4/pW9ECgK9wOSBVtGiMaMeK+lr6NPn8 zps8amItxFMEgckewp9vWs/k011DXl4= Received: from mimecast-mx02.redhat.com (mx-ext.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-339-1eJx4iy-Py6T3ZXP3xtEJA-1; Wed, 21 Feb 2024 11:26:42 -0500 X-MC-Unique: 1eJx4iy-Py6T3ZXP3xtEJA-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id DD27F3869152; Wed, 21 Feb 2024 16:26:41 +0000 (UTC) Received: from thuth-p1g4.redhat.com (unknown [10.39.194.110]) by smtp.corp.redhat.com (Postfix) with ESMTP id 0B958201154D; Wed, 21 Feb 2024 16:26:39 +0000 (UTC) From: Thomas Huth To: qemu-devel@nongnu.org, Peter Maydell Cc: qemu-ppc@nongnu.org, =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , Nicholas Piggin , Daniel Henrique Barboza , =?utf-8?q?C=C3=A9dric_Le_G?= =?utf-8?q?oater?= Subject: [PATCH 1/3] target/ppc/kvm: Replace variable length array in kvmppc_save_htab() Date: Wed, 21 Feb 2024 17:26:34 +0100 Message-ID: <20240221162636.173136-2-thuth@redhat.com> In-Reply-To: <20240221162636.173136-1-thuth@redhat.com> References: <20240221162636.173136-1-thuth@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.4 Received-SPF: pass client-ip=170.10.129.124; envelope-from=thuth@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.05, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org To be able to compile QEMU with -Wvla (to prevent potential security issues), we need to get rid of the variable length array in the kvmppc_save_htab() function. Replace it with a heap allocation instead. Signed-off-by: Thomas Huth Reviewed-by: Peter Maydell --- target/ppc/kvm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c index 26fa9d0575..e7e39c3091 100644 --- a/target/ppc/kvm.c +++ b/target/ppc/kvm.c @@ -2688,7 +2688,7 @@ int kvmppc_get_htab_fd(bool write, uint64_t index, Error **errp) int kvmppc_save_htab(QEMUFile *f, int fd, size_t bufsize, int64_t max_ns) { int64_t starttime = qemu_clock_get_ns(QEMU_CLOCK_REALTIME); - uint8_t buf[bufsize]; + g_autofree uint8_t *buf = g_malloc(bufsize); ssize_t rc; do {